Pith Number

pith:EJYNP7E4

pith:2018:EJYNP7E42LJB6VBLDKFHXRKYZJ

not attested not anchored not stored refs pending

High-level python abstractions for optimal checkpointing in inversion problems

Andrea Walther, Gerard Gorman, Jan H\"uckelheim, Mathias Louboutin, Michael Lange, Navjot Kukreja, Simon W. Funke

arxiv:1802.02474 v1 · 2018-01-12 · cs.MS · cs.CE

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{EJYNP7E42LJB6VBLDKFHXRKYZJ}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T00:24:08.159009Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2270d7fc9cd2d21f542b1a8a7bc558ca591c3118222707d9d1f003e389349dc0

Aliases

arxiv: 1802.02474 · arxiv_version: 1802.02474v1 · doi: 10.48550/arxiv.1802.02474 · pith_short_12: EJYNP7E42LJB · pith_short_16: EJYNP7E42LJB6VBL · pith_short_8: EJYNP7E4

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/EJYNP7E42LJB6VBLDKFHXRKYZJ \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 2270d7fc9cd2d21f542b1a8a7bc558ca591c3118222707d9d1f003e389349dc0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2f3635c0664885b900a489572f7605bf2081181a9b20e852c685e0f298c915eb",
    "cross_cats_sorted": [
      "cs.CE"
    ],
    "license": "http://creativecommons.org/licenses/by-sa/4.0/",
    "primary_cat": "cs.MS",
    "submitted_at": "2018-01-12T16:02:09Z",
    "title_canon_sha256": "dba634c4920e7aa6232403ff67e6de7da2d2b30a13273a37b2c2dfef2bfa1bdc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1802.02474",
    "kind": "arxiv",
    "version": 1
  }
}